A University of Pennsylvania economics professor suspected in the beating death of his wife will not be teaching when classes start up again Monday, the school said.

Prosecutors have not charged Rafael Robb but said they have circumstantial evidence that "very strongly" indicates he may have had a role in the slaying.

Robb, 56, has denied any involvement in beating, and told police he found 46-year-old Ellen Robb's body in their home in an upscale Philadelphia suburb after he returned from work on Dec. 22.

She was beaten so severely that investigators initially believed she had been blasted with a shotgun from close range. Detectives think the scene was staged to look like a burglary.

Montgomery County District Attorney Bruce Castor has said Ellen Robb's divorce plans were a possible motive for the killing. She told several people that she had hired a divorce attorney and planned to move into her own town house on Jan. 1, Castor said.

Robb remains a full, tenured professor, but under a mutual agreement, another instructor will take over the graduate seminar he was scheduled to teach on game theory, university spokeswoman Lori Doyle said.